Soaking feet with vinegar will not have a good therapeutic effect on the pain of the heel. The pain of the heel has the following kinds: First, it is more common to have local non-infectious inflammation, like inflammation of tendons, inflammation of tendon sheaths, or inflammation of small joints. Second, it may be a trauma, such as choking, or sports injuries. Third, there may be cysts or tumors, or localized keratosis of the skin, such as warts, corns, etc., causing pain or pressure in the heel. If it is inflammatory, you can use anti-inflammatory and pain-relieving drugs, such as Fenbid, Sanli pain and so on. If it is a cyst or tumor, it may need surgery, if it is a wart or corns can do cryotherapy, no matter what with vinegar to soak will not have a very good treatment effect.